Cylinder construction for engines



--Feb. 18', 1930. w. DALY 1,747,522

CYLINDER CONSTRUCTION FOR ENGINES.

Filed July 21, 1928 2 Invenlar Attorney Patented Feb. is, tee

WITJLIAM DAILY, OF MICHIGAN CITY, INDIANA CYLINDER CONSTRUCTION FOR ENGINES Application filed July 21,

This invention pertains to new and useful improvements in cylinder constructions for engines and the same has a more particular reference to cylinders cooled by air contact.

a Among the several objects of this invention provision is made whereby the piston is ways maintained in slight spaced operable relation to the cylinder, thus permitting only the packing ring thereon to contact with the in inner surface of the cylinder, with the end in view of eliminating scored cylinders which, as is well known, necessitate the reboring of the cylinder.

This achievement is attained by the em w ployment of the slide cylinder operable within an outer cylindrical wall, the slide cylinder having a hollow piston construction thereon operable within a stationary cylinder mounted within and spaced from the cylindrical wall, whereby the sliding movement of the sliding cylinder serves as a guide for the piston.

A particularly important object of the invention resides in the means whereby the stationary cylinder in which the piston is operable is maintained cool by aircontactduring the function of the engine.

The invention also has as a further object the provision of novel means whereby the slide cylinder is constantly lubricated by the splashing of the lubricant from the crank case through specially arranged ports in the walls of the piston and slide cylinder.

In the drawings: I

Figure 1 represents a vertical sectional view through the improved cylinder construction, and p Figure 2 is a horizontal sectlonal yiew through the construction taken substantlally on the line 2-2 of Figure 1.

Referring to the drawing in detail, whereinlike numerals designate like parts, a vertical cylindrical wall 1 is suitably flanged at its lower end 2 to permit the usual crank case to be attached thereto. The upper end ofthe cylindrical wall is provided with laterally disposed flanges 3 and 4respect1vely. Arranged slightly downwardly from the flangep 3 and 4 respectively are a plurahtygof long1- tudinally extending slots 5, formed through 1928. Serial No. 294,372.

the cylindrical wall 1 in circumferential spaced relation. A plate 6 is supported upon the flanges 3 and 4 respectively, and is formed with'a circular opening, from the edge portion of which depends a cylinder 7. The cyl- 5t inder 7 depends within the cylindrical wall 1 in spaced relation thereto and terminates below the openings 5. The cover plate 8 is arranged over the plate 6 and is formed with a bulged intermediate portion 9 to provide co a firing chamber 10. v

A hollow construction 11 has a valve stem 12 slidable through the bottom thereof and this valve stem is provided, at its upper end with a valve element 13 on a seat formed in the plate 6. This valve structure may be regarded as either theintake or exhaust valve, as the two are preferably located adjacent each other onthe line of observation toward Figure 1. Bolts 14 and nuts 15 serve to tightly bind the flanges 3 and 4 respectively, and cover plate 9 against the plate 6, for maintaining the depending cylinder 7 radially spaced to cylindrical wall 1.

YA cylindrical slide 16 is operable within 7 the cylindrical wall 1 and is adapted for snug slidable engagement with the inner surface thereof. A wrist pin 17 is journaled at its end Within the cylindrical slide 16.

A hollow piston structure 18 of a diameter so less than the diameter of the depending cylinder 7 is connected at its lower open end to the cylindrical slide 16, at an intermediate point therein, the same projecting upwardly, in spaced relation to the said slide, to termie5 nate at a point above the upper end of the said slide. The upper closed end portion of the piston is provided with circumferentially extending ribs 19, between which packing rings 20 may be disposed. The circumference ofthe rib 19 is less than the inner circumference of the depending cylinder 7, so that only the packing rings 20 will engage the depending surface of the cylinder 7, duringthe reciprocatory movement of the piston.

Adjacent the lower end of the piston 18 a plurality of openings 21 are formed incircumferentially spaced relation and through which oil may pass from the crank case into the space'between the piston and the cylindrical slide. The slide is likewise formed with a plurality of openings 22, whereby the lubricant may flow to the surface of the slide in contact with the inner side of the wall '1.-

Obviously air will enter through the open ings 5 during the downward stroke of the slide 16 and will be subsequently forced out upon the upward stroke thereof. In this manner the depending cylinder 7 will be;

maintained cool during the function of the en ine.

aving described the invention, what is claimed asnew is:

In a cylinder construction for eng nes comprising an outer cylinder formed with an opening adjacent the upperend thereof, an inner cylinder arranged Within the outer cylinder in spaced relation thereto and being v adapted to depend below the air opening in the outer cylinder, a slide cylinder operable within the outer cylinder andin snug contact therewith, means whereby a pitman may be connected to said slide cylinder, and a hollow; piston having its lower end open and integrally connected to said slide cylinder at an intermediate point therein, and being.

adapted to project above the top edge of the slide cylinder, and packings on said piston for wiping engagement with the inner sur- 30 face ofthe inner cylinder.

In testimony whereof I afiiiz my signature.

- WILLIAM DALY. 

